Cut the comedy!
and Cut the funny stuff!; Cut the shit!Stop acting silly and telling jokes!; Be serious! (Use shit with caution, as it is considered vulgar.) John: All right, you guys! Cut the comedy and get to work! Bill: Can't we ever have any fun? John: No. Bill: Come on, Mary, let's throw Tom in the pool! Mary: Yeah, let's drag him over and give him a good dunking! Tom: Okay, you clowns, cut the funny stuff! I'll throw both of you in!